首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
针对属性值为时间直觉模糊数的动态多属性决策问题,提出一种基于累积前景理论的直觉模糊动态决策方法.方法综合考虑决策者期望和决策信息熵两方面因素给出了时间权重的确定方法,以决策者期望和正负理想点作为参考方案确定前景矩阵,并以公平竞争原则确定最优属性权重,进而通过降维获得方案的综合前景值,根据综合前景值确定方案的排序.最后,通过实例说明了方法的可行性和科学有效性.  相似文献   

2.
研究了属性权重完全未知的区间直觉梯形模糊数的多属性决策问题,结合TOPSIS方法定义了相对贴近度及总贴近度公式.首先由区间直觉梯形模糊数的Hamming距离给出了每个方案的属性与正负理想解的距离,基于此,给出了相对贴近度矩阵,根据所有决策方案的综合贴近度最小化建立多目标规划模型,从而确定属性的权重值,然后根据区间直觉梯形模糊数的加权算数平均算子求出各决策方案的总贴近度,根据总贴近度的大小对方案进行排序;最后,通过实例分析说明该方法的可行性和有效性.  相似文献   

3.
针对属性值为直觉语言数,属性权重完全未知的风险型多属性决策问题,提出一种基于累积前景理论的决策分析方法.方法定义了一种新的直觉语言数距离(R-距离),并讨论它的性质;进而利用累积前景理论,分别以正、负理想方案为参考点计算各属性下各方案的累积前景值,构建累积前景决策矩阵;以综合R-距离最小化为目标,构建最优化模型计算属性权重;进一步依据各方案的综合累积前景值对方案进行排序.最后,通过实例分析说明了该方法的有效性.  相似文献   

4.
针对准则值为区间灰数直觉模糊数、准则权系数部分已知以及自然状态出现概率为灰数的多准则决策问题,提出一种结合前景理论和改进TOPSIS的决策方法。该方法首先定义了灰色直觉模糊数的前景价值函数和概率权重函数,并利用前景理论构建出前景决策矩阵;接着从两个方面对传统TOPSIS决策方法进行改进:(1)过定义方案间综合差异的概念,采用离差最大化思想,建立平均综合差异最大化规划模型,给出了一种兼顾主客观权重信息确定准则权系数的新方法;(2)用灰关联替换备选方案与正负理想方案的距离,据此刻画了各方案与正负理想方案的贴近度。进而利用改进TOPSIS决策方法中的综合贴近度对方案进行了排序。最后通过实例验证了该方法的有效性。  相似文献   

5.
针对属性权重未知,且属性值为犹豫模糊的问题提出了一种基于前景理论的VIKOR犹豫模糊多属性决策方法.首先,从方案和属性两个角度切入,以犹豫模糊数均值,方差和非明确熵构建多目标优化模型来确定权重;然后,通过犹豫模糊Euclidean距离定义了犹豫模糊环境下的前景价值函数,确定中位数参考点以及各个方案在各个属性下的综合前景值;最后,通过前景价值矩阵给出基于多准则妥协优化解(VIKOR)的方案排序,通过实证分析验证了方法的有效性和可行性.  相似文献   

6.
针对属性权重信息完全未知,属性值为三角犹豫模糊元的多属性决策问题,提出一种基于前景理论和模糊结构元的决策分析方法。首先,基于模糊结构元理论,定义三角犹豫模糊元的结构元形式和海明距离公式,并通过求解属性间距离离差最大化的优化模型确定权重。其次,依据前景理论,分别以正负理想点作为决策参照点,构建收益矩阵和损失矩阵。在此基础上,应用TOPSIS方法计算各备选方案的相对贴近度,并依据相对贴近度的大小实现备选方案排序。最后,通过算例验证方法是有效和可行的。  相似文献   

7.
一种基于前景理论的风险型区间多属性决策方法   总被引:1,自引:0,他引:1  
针对带有决策者期望且概率和属性值均为区间数的风险型多属性决策问题,提出一种基于前景理论的决策方法。在本文中,考虑了决策者的心理行为因素,首先以决策者对各属性的期望作为参照点,然后计算在每种自然状态下,每个方案针对各属性的属性值相对于参照点的收益和损失;进一步地,依据前景理论的思想,通过计算每个方案针对各属性的前景值建立前景决策矩阵;在此基础上,运用简单加权原则计算每个方案的综合前景值,并通过建立综合前景值两两比较的可能度矩阵对所有方案进行排序。最后,通过一个算例说明了该方法的可行性和有效性。  相似文献   

8.
针对模糊群体多属性决策问题,给出一种基于理想点法(TOPSIS)的多属性决策方法.方法先用三角模糊数的形式表示专家评价值的模糊性和不确定性,而后考虑了专家在不同评价属性中的重要程度和意见的相似度,并将专家意见进行集结得到专家群体关于方案集的模糊决策矩阵,最后定义了三角模糊数形式的正负理想方案,通过计算各方案与正负理想方案的距离以及各方案与理想点的相对接近度,最终确定最优方案.通过实例分析说明了该方法的可行性和有效性.  相似文献   

9.
一种新型风险型多指标决策方法研究   总被引:1,自引:0,他引:1  
传统的风险型多指标决策模型没有考虑决策者对风险的态度,而决策者对风险的态度会影响决策的结果,针对这一问题文章在累积前景理论与灰色关联方法的基础上,提出一种考虑决策者风险偏好的风险型多指标决策的方法.该方法首先利用极差化法对风险决策矩阵进行规范化处理,并在此基础上构造出最优与最劣方案;然后利用累积前景理论与灰色关联方法构建前景值函数,并给出利用灰色关联思想确定指标权重的方法与步骤;最终求出各个方案的综合前景值并进行排序选优.通过某电信运营商对管道资源建设方案选择的实例分析说明了方法的可行性与有效性.  相似文献   

10.
基于语言变量的多属性决策问题,提出了一种ElECTRE决策方法.首先将决策属性的语言评价值转变成三角模糊数,通过三角模糊数可能度的计算公式,将指标值从三角模糊数映射到优劣关系等价的实数值,然后利用改进的ELECTREII方法计算各方案之间的相对优势度矩阵和相对劣势矩阵,进一步求出方案之间的修正综合加权矩阵和各方案净优势值,根据各方案净优势值大小确定方案的优劣排序,最后通过应用实例表明,该方法简单明了,易于推广使用.  相似文献   

11.
12.
We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.  相似文献   

13.
It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.  相似文献   

14.
As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years (2001-2005). The main topics are: convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.  相似文献   

15.
Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.  相似文献   

16.
张丽娜  吴建华 《数学进展》2008,37(1):115-117
One of the most fundamental problems in theoretical biology is to explain the mechanisms by which patterns and forms are created in the'living world. In his seminal paper "The Chemical Basis of Morphogenesis", Turing showed that a system of coupled reaction-diffusion equations can be used to describe patterns and forms in biological systems. However, the first experimental evidence to the Turing patterns was observed by De Kepper and her associates(1990) on the CIMA reaction in an open unstirred reactor, almost 40 years after Turing's prediction. Lengyel and Epstein characterized this famous experiment using a system of reaction-diffusion equations. The Lengyel-Epstein model is in the form as follows  相似文献   

17.
In this paper, we study the explicit representation and convergence of (0, 1; 0)-interpolation on infinite interval, which means to determine a polynomial of degree ≤ 3n - 2 when the function values are prescribed at two set of points namely the zeros of Hn(x) and H′n(x) and the first derivatives at the zeros of H′n(x).  相似文献   

18.
19.
20.
<正>Aims and Scope Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,is one of the transactions of China Society for Industrial and Applied Mathematics,and is a bimonthly journal.JMRA is dedicated to publishing first-rate original research papers in all areas of mathematics with applications,and making research findings available to a wide scientific world,as JMRE has for many years.In line with the name change,the new scope of Journal of Mathematical Research with Applications will not include the articles on mathematical methodology and mathematical philosophy.Copyright Information  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号